@misc{indiciaee7b07b0e6373,
  title = {Waterfowl productivity and use of nesting structures in the prairie pothole region},
  author = {Rex R. Johnson and Kenneth F. Higgins and I.J. Ball and Stan C. Kohn},
  year = {1994},
  url = {https://pubs.usgs.gov/publication/70194950},
  note = {Source identifier: 70194950}
}